Discrepancy in postgresql entry in UPDATING

[Darren Pilgrim]

The entry reads:

20141208:
   AFFECTS: users of databases/postgresql??-(server|client)
   AUTHOR: marino at FreeBSD.org

   PostgreSQL version 9.3 is now the default. To upgrade from a version
   lower than 9.3, follow the instructions on the PostgreSQL.org website.
   http://www.postgresql.org/docs/9.3/interactive/upgrading.html
   Please note that the pg_upgrade program is installed by the
   databases/postgresql93-contrib port

   When using binary packages, if you only use the client port, you can
   issue the following command to follow the default version:

   # pkg set -o databases/postgresql92-client:databases/postgresql93-client

The problem is pg_upgrade requires both the old and new versions be 
installed concurrently--something pkg/ports can't do.  So how are we 
supposed to upgrade?